You mentioned BootCamp and if your were running the BootCamp partition as a Virtual Machine then you can still access the files from Finder on the BOOTCAMP Volume. If you were not using BootCamp and had a normal file based Virtual Machine then if you can't run the Virtual Machine your other choice is to mount the Virtual Hard Disk to have access to its File System. In a working VMware Fusion 3.x all one had to do is control-click the Virtual Machine Package selecting Open With > VMDKMounter and the Virtual Hard Disk would be mounted and available in Finder.
Here is what I'd try... Locate the Virtual Machine Package, by default it's in the "~/Documents/Virtual Machines.localized" folder noting that the .localized extension is hidden by default. Then control-click the Virtual Machine Package selecting Open With > VMDKMounter. If VMDKMounter is not on the list then select Other... and navigate to "/Library/Application Support/VMware Fusion/VMDKMounter.app".
Now since I never preform in place major version upgrades and always clean build between major version upgrades I do not know if this will work without some additional work. You may have to install FUSE for OS X in order for VMDKMounter to function.
As an example, I'm running OS X 10.8.3 and have VMware Fusion 5.0.3 installed and since VMware Fusion 5 does not contain VMDKMounter I installed both FUSE for OS X and the VMDKMounter.app bundle from the VMware Fusion 3.1.2 installer image using Pacifist although it can also be done manually if one sets the proper permissions as show in my reply, Re: Fusion 4: no VMDKMounter.
Another option is to download the latest version of VMware Fusion 5.x and install it using the free 30-day trial serial number, run the Virtual Machine and copy the User Data to the Macintosh HD or use a USB drive. You can then uninstall VMware Fusion and delete the Virtual Machine if you no longer need it.